轨道交通车辆隧道运行时车内CO2质量分数变化情况
毕仲国毕凯李长胜赵金龙于佳轩韩寒
Variation of In-car CO2 Mass Fraction during Rail Transit Vehicle Operation in Tunnel
BI ZhongguoBI KaiLI ChangshengZHAO JinlongYU JiaxuanHAN Han
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作者信息:中车长春轨道客车股份有限公司， 130113， 长春
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Affiliation:CRRC Changchun Railway Vehicles Co., Ltd., 130113, Changchun, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.20253020
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中图分类号/CLCN:U270.38+3
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栏目/Col:车辆制造与列车控制
摘要:
［目的］为给乘客带来舒适、健康、安全的出行环境，有必要对轨道交通车辆隧道运行时车内空气质量变化情况进行分析。［方法］基于国内外有关标准对轨道交通车辆空调新风量的规定，以京张高速铁路隧道为例，从车内CO2允许质量分数和车内压力波动控制逻辑的影响等方面，基于某动车组尾车的车内CO2质量分数变化实测情况，计算并分析不同计算工况下中间车的车内CO2质量分数变化情况。［结果及结论］车内CO2质量分数变化情况同压力波风门启闭、不同新风量、气密性和隧道内运行时间等因素均有一定的关系。由于车辆自身存在一定的泄漏，故进入车辆的新风值高于理论值。若列车进入隧道时关闭新风压力波风门，则在工况一、工况二、工况三下， 列车进入隧道后车内CO2质量分数达到0.250 0%的用时分别为13 min、9 min、7 min，列车进入隧道后车内CO2质量分数达到0.500 0%的用时分别为36 min、32 min、26 min。列车在长大连续隧道内行驶时间较长，建议按车内CO2质量分数不超过0.500 0%的要求进行控制，根据线路实际情况适当提高压力波风门开启时间间隔以保证压力舒适度。
Abstracts:
［Objective］ To provide passengers with a comfortable, healthy, and safe travel environment, it is necessary to analyze the changes in air quality inside rail transit vehicles during the tunnel operation. ［Method］ Based on the regulations in Chinese and international standards regarding the fresh air volume requirements for rail transit vehicle air-conditioning systems, the Beijing-Zhangjiakou High-speed Railway tunnels are taken as example, considering factors such as the permissible mass fraction of in-car CO2 and the influence of the in-car pressure wave damper control logic, the measured data of CO2 mass fraction variation in an EMU (electric multiple unit) tail car is used to calculate and analyze the CO2 mass fraction variation in the intermediate car under different operating conditions. ［Result & Conclusion］ The in-car CO2 mass fraction variation is related to the opening/closing of the pressure wave damper, different fresh air volumes, vehicle airtightness, and train tunnel operation time. Due to the inherent leakage in the vehicle, the actual fresh air intake is higher than the theoretical value. If the fresh air pressure wave damper is closed when the train enters the tunnel, the time taken for the in-car CO2 mass fraction reaching 0.250 0% under operating conditions one, two, and three is 13 minutes, 9 minutes, and 7 minutes, respectively; the time taken for the in-car CO2 mass fraction reaching 0.500 0% after train entering tunnel is 36 minutes, 32 minutes, and 26 minutes, respectively. Given the long travel time within extended continuous tunnels, it is recommended to control the in-car CO2 mass fraction within 0.500 0%, and to appropriately increase the interval time for opening the pressure wave damper based on actual line conditions to ensure pressure comfort.
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